* Hydration: Anhydrous copper(II) sulfate is a white powder. When it comes in contact with water, the water molecules form strong bonds with the copper ions (Cu²⁺). This process is called hydration.
* Energy Release: The formation of these strong bonds releases energy, causing the solution to heat up. This heat release is the characteristic of an exothermic reaction.
Observation: You can observe this exothermic reaction by feeling the test tube or beaker get warm when you add anhydrous copper(II) sulfate to water.
